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Negative on both...Sealed Power .030-over flat tops...heads untouched except for new seals and springs...The comp ratio is 10:1 .
The 268 was my first choice but the 274 is tempting...
Depending on how far below the deck those pistons are, & you say the heads are untouched, if your running a .040" gasket, your not at 10.1, my Ross pistons sat .017" below, & i was at 9.73, but if those are the reg. cast seal power pistons, then there around .080" below, your more like 8.7.1, but if there the six pack 2255s forged units, then your around 9.6.1, so what pistons do you have??
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